§
Luxuse
Patent Intelligence
Sign In
← Back to Patent Explorer
EP0134090A1 Expired / Lapsed EP ⏱️ 0.0 years remaining

Heating apparatus

Assignee: Thorn EMI Appliances Ltd
•
Filing: 1984-07-09
•
Granted: —
•
Expires: 2004-07-09
📄 Original PDF 🌐 Google Patents 🔄 Sync Now

Abstract

Abstract Heating apparatus includes a generally circular tray (1), having a layer (2) of insulative material disposed therewithin. The tray (1) supports, above the layer (2) each end of a number of tungsten-halogen lamps (5) and the tray (1) is urged upwardly towards the undersurface of a layer (11) of glass ceramic to form a cooking hob. A coating (12) or an infra-red reflective material, typically an oxide material, such as titanium dioxide, may be deposited on the layer (2) of insulative material so as to cause the layer (2) to be substantially impervious to infra-red radiation. As an alternative to the coating (12), the layer (2) may be surface-enriched with an infra-red reflective material.

Inventors

  • 👤 John Kenneth Cosslett
  • 👤 Graham Howlett Goodchild

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-11-02 23:01
CPC Classifications
H; H05; H05B; H05B3/00; H05B3/68; H05B3/74; H05B3/744

Claims Analysis

Total Claims: 11
Claim 1
Independent Claim 47 words
Heating apparatus including at least one source (5) of infra-red radiation disposed above, or partially embedded in, a layer (2) of insulative material, characterized in that said layer (2) of insulative material has been treated so as to cause it to be substantially impervious to infra-red radiation.
Claim 2
Dependent Claim 47 words
Heating apparatus including at least one source (5) of infra-red radiation disposed above, or partially embedded in, a layer (2) of insulative material, characterized in that said layer (2) of insulative material has been treated so as to cause it to be substantially impervious to infra-red radiation.
Claim 3
Dependent Claim 10 words
Heating apparatus as claimed in Claim 1 wherein said layer
Claim 4
Dependent Claim 16 words
(2) has been treated by application of an infra-red reflective coating (12) to the surface thereof.
Claim 5
Dependent Claim 16 words
(2) has been treated by application of an infra-red reflective coating (12) to the surface thereof.
Claim 6
Dependent Claim 22 words
Heating apparatus as claimed in Claim 2 wherein said infra-red reflective coating (12) consists of an oxide material, such as titanium dioxide.
Claim 7
Dependent Claim 26 words
Heating apparatus as claimed in Claim 1 wherein a surface layer of said layer (2) of insulative material has been enriched with an infra-red reflective material.
Claim 8
Dependent Claim 21 words
Heating apparatus as claimed in Claim 4 wherein said infra-red reflective material consists of an oxide material such as titanium dioxide.
Claim 9
Dependent Claim 44 words
Heating apparatus as claimed in any preceding claim wherein the surface of said layer (2) of insulative material is formed with one or more grooves (21) to accommodate an underside portion of the surface area of the or each source (5) of infra-red radiation.
Claim 10
Dependent Claim 34 words
Heating apparatus as claimed in any preceding claim wherein the or each source (5) of infra-red radiation comprises a tungsten-halogen lamp including a tungsten filament (7) supported within a generally tubular quartz envelope (6).
Claim 11
Dependent Claim 17 words
. 8. A cooking hob incorporating at least one heating apparatus as claimed in any preceding claim.

References Cited (Backward Citations)

US3345498A Cited
US3355574A Cited
US3718497A Cited

USPTO Annuity & Maintenance Windows

Maintenance schedule is calculated for granted US utility patents.

Assigned Categories & Tags

No categories assigned to this patent yet.

Assign Category Tag